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Source Drivers with cascaded connection and diagnostic capability

Publishing Venue

IBM

Abstract

This invention provides the simple video data transfer method between the LCD controller and LCD X-drives.
This method is to add the output ports of X-Driver for transfer the data from the controller to the next driver in order to avoid complex wiring from the controller to the each X-drivers ,EMI noise and signal quality degradations.
This data output ports of X-driver enable to make cascade connection of all X-drivers, and to get the last data from the the end of X-drives for the diagnostics of data transfer system.
This inventions are 1) X-Driver(Source Driver) which has the input/output port to make cascade connection. 2) Diagnostics mechanism using the X-drivers output port feedback. Most data transfer methods between the X-drivers and the controller are bus connection. In this case, it is not easy to increase the number of X-drivers controlled by one controller.

Country

United States

Language

English (United States)

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This method is to add the output ports of X-Driver for transfer thedata from the controller to the next driver in order to avoidcomplex wiring from the controller to the each X-drivers,EMI noise and signal quality degradations.

This data output ports of X-driver enable to make cascade connection ofall X-drivers, and to get the last data from the the end of X-drivesfor the diagnostics of data transfer system.

This inventions are1) X-Driver(Source Driver) which has the input/output portto make cascade connection.2) Diagnostics mechanism using the X-drivers output port feedback.Most data transfer methods between the X-drivers and the controllerare bus connection. In this case, it is not easy to increase thenumber of X-drivers controlled by one controller.

It is easy to increase the X-drivers with cascade connection by this inventionmethod.

Also it is easy to reduce the number of signals from the controllerusing higher transfer rate, because this method uses one to one signal connection.